No they are not, since car creation is the biggest part in Victory. Still, Teams are not really intended for experienced drivers with deep knowledge about the game - they are made to give new players some decent cars at a good price (remember, a 60 PP car costs you 12600 credits + tires and engines + paintjob + visual items, while the 60 PP car of a team costs just 7600 credits) and help them "advance" in the game!